Tube-rolling apparatus.



R. E. BROCK 6L W. M. SHLKIRK. TUBE ROLLING APPARATUS.

APPLIUATION FILED um. gm, 1910.

1,020,399, Patented Mar. 19, 1912.

FIG. 1

, R. E. BROCK L W. M. SELKRK.`

TUBE ROLLING APPARATUS.

APPLICATION NLBD DBo.so,1o1o.

1,020,399. Patented Mar. 19, 1912.

A QSHEETS-SHLLI 2.

ernten' efrriie rirrnrrr ernten.

RICHARD E. BROCK AND WILLIAM M. SELKIRK, F MONESSEN, PENNSYLVANXA, .AS- SIGNORS TO PITTSBURGH STEEL PRODUCTS COMPANY, OI" PITTSBURGH, PENNSYL- VANIA, A CORYORATION OF PENNSYLVANIA.

TUBE-ROLLING APPARATUS.

Specification of Letters Patent.

Patented Mai'. 19, 1912.

Application filed December 30, 1910A Serial No. 600,031.

I Apparatus; and We do hereby declare the following to be a full, clear, and exact description thereof.

Our invention relates to tube rolling apparatus and more especially to the rolling of seamless tubing.

The object of our invention is to provide a simple and etlicient form ot mechanism b v means of which the tube-blank when forced through the roll-pass onto the mandrel may be stripped from the mandrel and returned -to the receiving side of the rolls without the necessity of raising the rolls or passing the blank over or under the same. v

To these ends our invention consiste, generally stated, in a two-high mill 'having a pass for the tube in rollinlgr and a dummypass, means for feeding the tube-blank onto f the mandrel bar supported in the roll-pass,

and means 't'or withdrawing the mandrel-bar and the tube thereon and moving the tube and mandrel-bar transversely in line with the dummy-pass, and means 'tor teedinelr the tube hack through the dummy-pass to the receiving' side ot the rolls to be airain brought into aliuement with the working pass`and the mandrel therein 'for :mother passage through 'the rolls.

ln the drawings [figure l is a plan view ot' our improved apparatus, showingf the mandrel and tube blank al'ter the tube has been tort-ed onto the mandrel; Fig. Q is a like view showing the mandi-el and tube in position with reference to the dummy-pass; Fig. El is a side elevation partly in section; Fig. Llis an end view; and Fig. 5 is a crossseetion on the line 5-5 Fig. l with mandrel bar support partly broken away.

lfn the drawings the numeral 2 designates a suitable housing, containing the rolls 3, driven in opposite directions by any Suitable power. These rolls have the workingpasses l and the dummy-pass At the receiving side of l-he rolls; is the table or trough (3 which is mounted on the supporte 7 and is laterally movable thereon by means of the cylinders 8. provided at the receiving side of the rolls A pusher f) isv which is operated by means of the cylinder 10. Atv the opposite side ot the rolls is the mandrel-support ll which consists of the bars 12 which are supported at their ilorward ends by the housingr and at their rear endel in the back-stop 13, said bars passing through said back-stop and having the nuts 14 secured thereto. A movable baclestop 15 is mounted to slide upon the rods 12 and interposed between said movable back-stop 15 and the baek-stop 13 is the removable spacer or block 16. The movable back-stop 15 is moved by means ol the cylinder 17, the piston rod 18 ot which is connected t0 said back-stop. To raiseand lower the removable hlock 1G we. employ a cylinder 19. The sides ol the block lll are preferably slightly tapered as indicated and engage the tapering faces 2() and :'21 otthe back-stops l5 and l for the pui-,pose more fully hereinafter set forth.

The mandrel-bar supports 22 are arranged at intervals on the rods lZ and movable in said supports are the guides 23, These guides 23 are provided with the flaring mouthed passages 24 l'or the reception of the inandrels and the tulmlmf-blank surrounding the same. dove-tail connection with the supports QQ. litnen 25 are connected to the guides .23 and at their opposite ends said pitmen are connected to the Straps 2G ot the eeeentries Q7. The f uxcentries 27 are keyed to the shaft .29 and said shaft is supported by the arms il() extending trom one ot the rod's '12. At one end ot' the shaft, 2.() is the pinion 3l which is engaged by the rack 3l. This rack 3l iS connected up to the cylinder 32.

The key 33 on the shalt 2E) engages a kevway on the eccentric 27 adjacent. to the movable baclestop l5 and connected thereto to provide for the sliding' of the eccentric on the shaft 29, when the back-stop l5 is moved backward and forward. An anchor-bar 3l is dovetailed to slide in the back-stop 15 and said anchor-bar forms the support for the rear end oit the mandrebhar The mandrel-bar may he screwed or otherwise secured in .said anchor-bar. bar is connected by the pitman 3G to the strap of the eccentric 27 connected to the movable backLstop (l5.

ln the operation bf our improved apparatas, in the rolling of tubes, the tubular- 'lhe guides Q25 have a -7 This anchorrolls it is necessary vwthe 'mandrel-bar 35 with the working-pass being withdrawn a `rack-bar 31 and pinion 31a ment is imparted to the shaft 29. The ec-L the trough G, in line 4 of the rolls. `The blank is forced into the rolls by means-of the pusher 9 and is carriedby the action of therolls over the mandrel-plug andonto the mandrel-bar hlVhen the tubular'- blank has passed completely through 'the to provide for transferring the tubular-blank over the mandrelblanlr te() is placed in bar to the opposite or receiving side of thel rolls to be again passed through the same.

This we accomplish in the following man` lowered by admitting fiuid to the cylinder 19 and when said bloclr ner: rThe block 16 is is lowered the movable back-stop 15 is moved back by admitting fluid to the cylinder 17, The tapering of the block 16 prevents the binding of said block and permits of its -nd moved into engagement with the back-stop more readily. By theA,haelivardv movement -of the back-stop 15 connected to the anchorbar 34 is moved backward untilthe forward end of the mandrel the mandrel-plug having been1removed5 clears the rolls as indicated in Fig. 2. Mol-.ive fluid is now ad.- mitted to the cylinder 32 and through 'the a rotary moveeentrics are rotated through the action of the lpitmen 25 thleguides 23 are moved in the supports 22 and the mandrel-bar together with the tube are moved over into the position indicated' in Fig. 2 in line with the dummy-pass 5. With the tubular-blank in line with the dummy pass the blanl is forced through said dummypass and -iftripped from the mandrel-bar 35 until it is 'transferred to the receiving trough G at the other side of the rolls. This stripping of the tubular-blank from the mandrel-bar 35 and the carrying of it through the dummyass may be accomplished by means of suitable feed rolls 37 which are operated by means of cylinders 38. The tubular blxnk may be pushed by any suitable means into position to be seized'by the rolls 37. The trough 6 is now moved over into line with the working-pass of the-rolls by means of the cylinders 8 and at the same time the rack-bar 31 is moved in the opposite direction and the shaft 29 rotated to move the mandrel-bar and its support back into position in line with the working-pass to receive the tubular-blank as itis again fed to the rolls by the pusher 9. In this manner we provide for the transfer of the tubular blank '.to the receiving side of the rolls without passing thev same over or below the rolls and without lifting the rolls, the operation of withdrawing the mandrel-har and moving it laterally being accomplished with great rapidity so that there is little opportunity for the blank to cool in' the transfer back to the receiv'ng side of the rolls.

In tube rolling apparatus,

Loaders ried thereby transversely into line with the dummy-pass.

2. In, apparatus for rolling tubing., the combination of power-driven rolls having a Working-pass and a dummy-pass, a mandrel-bar supported in line withA the working-pass, and means forsuccessively withdrawing said mandrel-bar and moving thel same transversely together with the tubularblanlr supported therelf y into line with the dummy-pass.

3. vIn apparatus combination of power-driven rolls having a working-pass and a dummy-pass, a mandrol-bar, a movable back-stop for said mandrel-bar, a transversely movable support for said mandrel-bar, and mechanism for movinU said transversely movable support to bring said mandrelbm" and the tubularblank supportedtliereliiy into line with the dummy-pass-j l the combination of power-driven rolls having a` working-pass and a dummy-pass, amandrel bar,

a movable back-stop for said mandrel-bar, a transversely movable anchor on said backstop with which said mandrel-bar engages, and mechanism for moving said anchor to bring mandrel-bar and the tubularblanh supported thereby into line with the dummy-pass.

5. In apparatus for rolling tubing, the combination with power-driven rolls having a working-pass and a dummy-pass, a inandrel-bar, a. movable back-stopya transversely movable anchor on said back-stop with which said mandrel-bar engages, transversely movable mandrel-bar supports at intervals, and mechanism for moving said anchor-bar and supports simultaneously 'to bring said mandrel-bar and tuloular-blanltl carried thereby into line with the dummypass.

6. ln apparatus for rolling tubing, the combination of power-driven rolls having a working-pass and a dummy-pass, a mandrel-bar, a back-stop, a movable back-stop, a removable spacing member between said back-stops, said mandrel-bar being supported by said movable back-stop, )and means for moving said mandrel-bur transversely to bring said mandrel-bar and the tubular-blank carried thereby into line with the dummy-pass.

7. In apparatus for rolling tubing7 the combination of power-driven rolls having' a working-pass and a dummy-pass, a mandrel-rod, a bach-stop.r a movable bach-stop,

for rolling tubing, the

lil@

a taperiilgspacing member between said back-sto s; saidmandrebbar being supported by said movable backstop, .and means for moving said mandrel laterally to bring sai mandrel and the tubular-blank earned thereby into linewith the dummy-I 8. In apparatus for rollmg tubmg, the co Ibintion of rolls having a working-pass aIfI a dImmy-pass, a mandrel-bar, a movabl'e bank-stop, transversely movable slup-A parts for said mandrel-bar, eccentrica, con- I nnections between said eccentrics and' said for `operatmg sind lhave hereunto set our hands.

RICHARD IE. BROCK.' WILLIAM M. SEALKIRK.

Witnesses: ROBERT C. Torn-1m.

JOHN F. WILL. 

